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dc.contributor.authorQiu, Y.
dc.contributor.authorBroholm, C.
dc.contributor.authorIshiwata, S.
dc.contributor.authorAzuma, M.
dc.contributor.authorTakano, M.
dc.contributor.authorBewley, R.
dc.contributor.authorBuyers, W.J.L.
dc.date.accessioned2010-01-11T18:48:43Z
dc.date.available2010-01-11T18:48:43Z
dc.date.issued2005-06-01
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics) 1 June 2005, vol.71, no.21, pp. 214439-1-8en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33766
dc.description.abstractLa4Cu3MoO12 is a cluster antiferromagnet where copper spin-1/2 trimers form a network of strongly coupled spin trimers. The magnetic properties of this material have been examined using magnetic neutron scattering. At low temperatures, excitations from the ground state are observed at 7.5(3) meV and 132.5(5) meV. An additional peak in the neutron scattering spectrum, which appears at 125.0(5) meV on heating, is ascribed to a transition between excited states. The wave vector and temperature dependence of the inelastic magnetic scattering cross section are consistent with intratrimer transitions. Magnetic neutron diffraction reveals antiferromagnetic order below TN=2.6 K with a wave vector (½00). The ordered magnetic structure is described as intertrimer order where spin correlations within trimers are controlled by the strong intratrimer interactions. Combining the information derived from elastic and inelastic magnetic neutron scattering with group theoretical analysis, a consistent set of intratrimer interactions and ordered magnetic structures is derived. The experiment provides a simple worked example of magnetism associated with interatomic composite degrees of freedom in the extreme quantum limit.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectintratrimer transitionsen_US
dc.subjectinelastic magnetic scattering cross sectionen_US
dc.subjectcopper spin-1/2 trimersen_US
dc.subjectcluster antiferromagneten_US
dc.subjectspin-trimer antiferromagnetismen_US
dc.subjectgroup theoretical analysisen_US
dc.subjectspin dynamicsen_US
dc.subjectneutron diffractionen_US
dc.subjectinteratomic composite degrees of freedomen_US
dc.subject7.5 meVen_US
dc.subject132.5 meVen_US
dc.subject125 meVen_US
dc.subject2.6 Ken_US
dc.subjectlanthanum compoundsen_US
dc.subjectgroup theoryen_US
dc.subjectground statesen_US
dc.subjectexcited statesen_US
dc.subjectcopper compoundsen_US
dc.subjectantiferromagnetic materialsen_US
dc.subjectLa4Cu3MoO12en_US
dc.titleSpin-trimer antiferromagnetism in La4Cu3MoO12en_US
dc.typeArticleen_US


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